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71 lines
2.1 KiB
71 lines
2.1 KiB
// Copyright 2013 Google Inc. All Rights Reserved. |
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// |
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// Licensed under the Apache License, Version 2.0 (the "License"); |
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// you may not use this file except in compliance with the License. |
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// You may obtain a copy of the License at |
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// |
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// http://www.apache.org/licenses/LICENSE-2.0 |
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// |
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// Unless required by applicable law or agreed to in writing, software |
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// distributed under the License is distributed on an "AS IS" BASIS, |
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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// See the License for the specific language governing permissions and |
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// limitations under the License. |
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// |
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// Data model and I/O for glyph data within sfnt format files for the purpose of |
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// performing the preprocessing step of the WOFF 2.0 conversion. |
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#ifndef WOFF2_GLYPH_H_ |
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#define WOFF2_GLYPH_H_ |
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#include <stddef.h> |
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#include <inttypes.h> |
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#include <vector> |
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namespace woff2 { |
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// Represents a parsed simple or composite glyph. The composite glyph data and |
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// instructions are un-parsed and we keep only pointers to the raw data, |
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// therefore the glyph is valid only so long the data from which it was parsed |
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// is around. |
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class Glyph { |
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public: |
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Glyph() : instructions_size(0), composite_data_size(0) {} |
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// Bounding box. |
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int16_t x_min; |
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int16_t x_max; |
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int16_t y_min; |
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int16_t y_max; |
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// Instructions. |
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uint16_t instructions_size; |
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const uint8_t* instructions_data; |
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// Data model for simple glyphs. |
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struct Point { |
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int x; |
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int y; |
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bool on_curve; |
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}; |
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std::vector<std::vector<Point> > contours; |
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// Data for composite glyphs. |
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const uint8_t* composite_data; |
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uint32_t composite_data_size; |
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bool have_instructions; |
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}; |
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// Parses the glyph from the given data. Returns false on parsing failure or |
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// buffer overflow. The glyph is valid only so long the input data pointer is |
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// valid. |
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bool ReadGlyph(const uint8_t* data, size_t len, Glyph* glyph); |
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// Stores the glyph into the specified dst buffer. The *dst_size is the buffer |
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// size on entry and is set to the actual (unpadded) stored size on exit. |
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// Returns false on buffer overflow. |
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bool StoreGlyph(const Glyph& glyph, uint8_t* dst, size_t* dst_size); |
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} // namespace woff2 |
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#endif // WOFF2_GLYPH_H_
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